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Well to answer your question magma forms in all the ways but if it forms at a low temp it need a higher pressure. and it forms at a high temp it needs a low pressure. Hope this helped this might not be 100% right though
The upper mantle and the lower mantle.
The mantle is divided into the upper mantle and the lower mantle. The upper mantle lies directly beneath the Earth's crust and extends to a depth of about 410 miles. The lower mantle extends from the bottom of the upper mantle to a depth of about 1,800 miles.
the inner mantle is hotter than the outer mantle.
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The lower part of the mantle is called the "lower mantle" or "mesosphere", while the upper part of the mantle is referred to as the "upper mantle" or "asthenosphere".
Mantle Is The Below Layer Of The Crust In Earth.
The mantle is divided into two main layers: the upper mantle and the lower mantle. The upper mantle is closer to the Earth's crust and is more rigid, while the lower mantle is hotter and flows more easily due to higher temperatures and pressures.
Mantle's mother's name was Lovell Mantle.
No the Mantle seperates the crust and the outer core
upper mantle
The middle mantle is just above the lower mantle.